The work that went into developing the RS-4 muffler design paid big dividends in 2010 with winning the AMA 450 Supercross and Motocross Championship series, and again in 2012 winning...
Free shipping and returns available on all orders!
We ship all US domestic orders within 5-10 business days
Materials
The item with the Committed label has a lower environmental impact because it was made with sustainable materials or methods. We are committed to creating items that combine sustainability with style. Made with recycled cashmere and industril by products.
Size Chart
Care Instructions
We advise routinely dusting your items with a gentle cleanser to preserve its look. Periodically, it may need to be softly wet with a mild detergent solution.
The work that went into developing the RS-4 muffler design paid big dividends in 2010 with winning the AMA 450 Supercross and Motocross Championship series, and again in 2012 winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 for Road Racing — a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a Polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
Pentagonal shaped sleeve.
Front muffler cap functions as a polyresonant chamber which helps reduce noise.
Two-stage stepped baffle.
Carbon fiber end-cap.
Stainless steel tail-pipe.
Choosing a selection results in a full page refresh.